The hold up comes from a disagreement among Republicans about whether or not to support a provision in the bill that doubles how much the U.S. gives to the International Monetary Fund and changes where the money goes within the lending institution.

The U.S. is one of the world’s biggest supporters of the IMF, which lends money to economically troubled countries like Ukraine. (The European Union tied its $15 billion aid package to Ukraine to a stipulation the country works with the IMF to stabilize its finances.)

Some Republicans, like House Speaker John Boehner, R-Ohio, think now isn’t the time for the United States to restructure its commitment to the IMF. The House passed a Ukraine aid bill last week without any mention of the fund.

But Secretary of State John Kerry told a Senate committee the same day the IMF restructuring is critical to supporting Ukraine.

“It would be a terrible message to Ukraine for everybody to be standing up talking, appropriately, about what’s at stake and not to be able to follow through,” he said.

Either way, as members of Congress head back to their districts Friday for a week-long recess, it will be without a solution to supporting Ukraine — even as tensions are sure to rise there over the weekend.